The deltoid muscle (or musculus deltoides) is the muscle [1] forming the rounded contour of the human shoulder. It is also known as the 'common shoulder muscle', particularly in other …

Sep 2, 2025 · The deltoid is a muscle responsible for lifting the arm and helping the shoulder to move. Strains and injuries from overuse can lead to pain. Learn more here.

Apr 23, 2024 · The deltoid is a large, thick triangular skeletal muscle in the shoulder joint, connecting the arm to the body trunk. Its name derives from ‘delta’ (Δ), the Greek letter that it …

Your deltoid muscles are in your shoulder, which is the ball-and-socket joint that connects your arm to the trunk of your body. Deltoid muscles help you move your arms in different directions.

The deltoid is a very powerful muscle and is used in many ADLs (e.g. putting on clothes, carrying shopping bags, washing hair) and many athletic activities (e.g. netball, swimming, water polo).

Sep 23, 2025 · The deltoid muscle is one of the main abductors of the shoulder, meaning it helps lift the arm when reaching for objects or brushing the hair. It’s also activated when carrying …

Apr 12, 2025 · The deltoid muscle is a large muscle that encompasses the shoulder joint. The deltoid is divided into three different portions, or heads, the anterior (front), middle, and …

Oct 30, 2024 · The deltoid muscle covers the top of each shoulder joint. This deltoid muscles workout uses dumbbells to improve posture, mobility, strength and shoulder injury risk.

Dec 14, 2023 · The deltoid muscle is the main muscle of the shoulder. It helps to lift the arm up and rotate the shoulder.

Aug 21, 2025 · Your deltoid is a large muscle that helps stabilize and move your shoulder joint. Deltoid injuries like muscle tears or strains can cause severe pain.